A great starting place.
Obviously you're first going to need to install PHP on your system if you haven't done so yet. Developed on PHP 8.0, if you are on a different version, your mileage may vary...
Next, you'll need some dependencies. Install composer, then run:
composer install
Finally, bring up the docker containers via laravel sail:
./vendor/bin/sail up -d
That's it for the backend. Head over to <resources/frontend/README.md> to build the angular frontend.
Now that everything is set up, run the test with:
./vendor/bin/phpunit
Look in the coverage folder for what's covered and what's not
After you make your changes there are some static analysis rules to ensure type safety:
./vendor/bin/phpstan
After you make your changes there are some lint rules to keep everything nice and neat.
./vendor/bin/phpcs